SUN HYDRAULICS CORP
DOFPLBN/AP
Multi-Function

This is a normally open, balanced poppet, switching element. When pilot pressure is applied to port 3, the poppet remains open until the pilot pressure reaches the setting established by the integral pilot relief stage, at which point the poppet shifts to the closed position.

• Unique balanced construction provides predictable switching with 5000 psi (350 bar) at both port 1 and port 2. When the remote pressure signal at port 3 exceeds the internal valve setting, the valve shifts to the closed position.
• Any backpressure at the drain port is directly additive to the valve setting.
• Valve will open when the pilot pressure falls below 145 psi (10 bar).
• These valves are hydraulically balanced between port 1 and port 2.
• Port 1 and port 2 are fully sealed from port 3 and port 4. Ports 3 and 4 are positively sealed.
• Leakage rate between port 1 and port 2 is very low, typically less than 10 drops/min. at 5000 psi (0,7 cc/min at 350 bar).
• All ports will accept 5000 psi (350 bar).
• Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.